Hoist mechanism for power loaders for mixers



May 4 1926. 1,583,318 v S. SHAFER, JR

HOIST MECHANISM FOR POWER LCADERS FOR MIXERS Filed Feb. 23, 1924 2 Sheets-Sheet l fjwvemtoz May '4 1926.

1,583,318 s. SHAFER, JR

HOIST IECHANISM FOR POWER LOADERS FOR MIXERS Filed Feb. 23, 1924 z-sheets-sheet 2 gwwntoz Patented May 4, 1 926.

uNrr stares SAMUEL snnrnn, an, or MILWAUKEE, WISCONSIN, ASS IGNQR '10 CHAIN BELT 00 IPANY, or MILWAUKEE, wrsccnsrn, A oonronnrron or WISCGNSIN.

nors'r MECHANISM non rowan Lonnnns ron MIXnns.

Application filed February To all whom-it may concern:

Be it known that l, SAMUEL Snares, J12, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of isconsin, have invented certain new and useful Improvements in Hoist Mechanism for Power Loaders for Mixers, of which the following is a specification.

This invention relates to loading appa-ra-- tus in which a vessel that receives the loadv or charge is periodically moved from a receiving to a discharging position, and the invention has for its object to apply the power that moves said charging, vessel to advantage. My invention is primarily 1ntended for use in connection with a charging to which my invention is applied, the re ceiving position of the skip and its assoclated and co-operating parts, being represented in full lines, the discharging posi-' tion thereof by dotted lines, andan intermediate position by dot and dash lines.

Fig. 2 is a rear elevation of the apparatus. In the accompanying drawings-A. designates the framework of a concrete mixing machine, the drum of which is designated B. O represents the loading skip or hopper into which, when resting upon the ground or in a lowered position, a charge of materials to be mixed is delivered, and which when moved to the position indicated by dotted lines in Fig. 1, discharges such charge into the drum B. V The spout portion 0 of the skip has secured to its opposite sides the bars D which arelpivotally connected, at E, E, with the frame of the machine. The parts thus far described are well known'in theart and serve to locate the pivot of the skip in advance of the nose or forward end of the spout section 0 thereof.

2, 2 indicate a pair of legs secured to a pivot shaft 3 which is supported in the frame of the machine, the legs constituting a boom and being located at the sides of the 23,1924... Serial No. 694,744.

skip, thespout section of which lies between them. 7

In the upper ends of the boom formed by the legs 2, 2 is mounted a shaft 4t that can ries at its ends a'pair of winding drums 5, and at an intermediate point a power drum 6 which is preferably of considerably larger diameter than the winding drums 5.

10 indicates a cable through which the.

movements of the skip C are controlled. Its'opp'osiite ends are secured to the windingdrums 5 and its intermediate portion passes under the skip to which it is secured. The cable 10 preferably winds over the drums 5, leavingthe latter at the rear sides, as clearly represented in Fig. 1. Each strand of the cable lO-operates in controlling the movements of the skip, and if connected therewith on its longitudinal central line, a single strand ofv cable would be sufficient. However, in view of the large size of the skip represented in the drawings and the fact that it is unevenly loaded from time to time in use, I prefer to arrange the cable as'shown,.that is, carry it under the skip, so that practically its two strands are connected with the skip at its sides and extend thence to separate winding drums 5. It will be seen that the drums 5 are located at the ends of the shaft 4 and outsideof the legs 2, while the po-wer drum 6 is located upon the portion of the shaft between the legs. This arrangement is advantageous because it permits the cables 10 to pass from the sides of the skip to which theyare attached to the winding drums 5 without much, if any, divergence, as is shown in Fig. 2.

A second cable 11 is connected with each winding drum 5. This cable winds under the drum, when the cable 10 winds over it, and leaves the drum from the'under side in the arrangement shown, andthence it passes to an attachment- 12 on the frame of the machine where the. end of the cable is secured.

A third cable 13 is wound upon the large.

power drum 6, \e:;tending thence over guide pulleys 9 on the frame of the machine and to a power driven drum 7 mounted on a shaft 8 suitably geared with a motor or engine.

The parts being in position represented in .full lines in Fig. 1, if power be applied through the shaft 8 to turn the pulley 7 so as to wind thereon the cable 13, the large power drum 6 will be turned in the direction of the arrow a. This will wind the cables 10 and 11 upon the pulleys 5, with the result that the skip will be lifted, turning about its pivot E, and the boom that carries the winding drums will be swung forward or toward the left, as represented in Fig. 1. The movements thus simultaneously imparted to the skip and the boomcause these parts tov successively assume the positions represented in Fig. 1. It will be seen that the boom and skip are so related to each other that the cable when the parts are in skip-loading position, represented in full lines, occupies a line that is approximately tangential to the circle described by that portion of the skip to which the cable is attached; in other words, so that a pull upon the cable applies power to lift the skip and its lead the greatest ad vantage. hen the parts assume the intermediate position represented by dot and dash lines, or the final discharging position, represented by. dotted lines, the relations just described are substantially maintained, that is to say, the cable 10 always occupies a line closely approximating a tangent to the circle of movement of the point to which the cable is attached to the skip. To insure. these relations the skip moves much more rapidly and through a greater are than does the boom, and this is made possible because the skip is moved, first by reason of the winding of the cable 10 upon'the drum 5 and hence the shortening of the cable, with the resultant movement of the skip toward the drum, and is further moved because the drum 5 has itself been bodily moved in the general direction of movement of the skip, causing the latter to follow it, irrespective of whether or not the cable 10 is shortened.

The winding drum 5, in its relation to the cable 10 may be considered as a support for the cable, and so far as some features of my invention are concerned it is quite immate-rial whether the cable 10 winds upon the drum 5 or merely passes across it. In either case the drum is a support for the cable from which it extends to the skip, and provision is made for changing the length of this cable bet-ween said support and the attaelnnent to the skip.

By making the power drum 6 large relative to the size of the winding drums 5 the danger that the boom. shall be drawn forward without turning the shaft 4 and the winding drums supported thereon, is overcome. I

I have represented the drums 5 as being each divided at its center so that the portions on which respectively are wound the cables 10 and 11 are separated from each other. It will be understood that the drums for the said cables might be entirely independent of each other, although the arrangement shown is preferred as tending to simplicity of construction.

So, also, a single. cable 11 might take the place of the two cables represented in the drawings, in which event the drum on which the said single cable would wind would be located the center of theshaft 4. Such, and other minor changes from the specific showing of the drawings might be made without departing from the spirit of the invention here presented, as will be apparent to those skilled in the art to which my invention belongs.

What I claim is 1. The combination with a pivoted loading skip, of apivoted boom formed of two.

legs between which the discharge end of the skip lies, a cross shaft extending between the upper ends of the boom and supported thereby, a winding drum supported on the said cross shaft, a cable for tilting the skip extendin from the latter to the windin drum, another cable extending from a drum on the shaft to a fixed attachment, and means for turning the said shaft to wind the cables.

2. The combination with a pivoted loading skip, of apivoted boom formed of two legs between which the discharge end of the skip lies, a cross shaft between the upper ends of the legs of the boom, winding drums on the ends of the cross shaft located out side the legs, cables extending from the skip to the said winding drums, other cables extending from the drums to fixed attachments, the cables being wound on the drums so that when the shaft is turned in one direction all of the cables are wound up, and when turned in the opposite direction all are let off, and another drum of larger size than the winding drums supported on the shaft between the legs of the boom, a cable wound upon the said larger drum, and means controlling the movements of the last said cable.

SAMUEL SHAFER, JR. 

